1 files changed, 64 insertions, 0 deletions
diff --git a/bundles/org.eclipse.equinox.p2.engine/src/org/eclipse/equinox/internal/prov/engine/EngineActivator.java b/bundles/org.eclipse.equinox.p2.engine/src/org/eclipse/equinox/internal/prov/engine/EngineActivator.java
new file mode 100644
index 000000000..ee0b3eeac
--- /dev/null
+++ b/bundles/org.eclipse.equinox.p2.engine/src/org/eclipse/equinox/internal/prov/engine/EngineActivator.java
@@ -0,0 +1,64 @@
+/*******************************************************************************
+ * Copyright (c) 2007 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.equinox.internal.prov.engine;
+
+import org.osgi.framework.*;
+import org.osgi.util.tracker.ServiceTracker;
+import org.osgi.util.tracker.ServiceTrackerCustomizer;
+import org.eclipse.equinox.prov.core.eventbus.ProvisioningEventBus;
+import org.eclipse.equinox.prov.engine.Engine;
+
+public class EngineActivator implements BundleActivator, ServiceTrackerCustomizer {
+	private static BundleContext context;
+	public static final String ID = "org.eclipse.equinox.prov.engine";
+
+	public static BundleContext getContext() {
+		return context;
+	}
+
+	private ServiceRegistration registration;
+	private ServiceTracker tracker;
+
+	public void start(BundleContext context) throws Exception {
+		EngineActivator.context = context;
+		tracker = new ServiceTracker(context, ProvisioningEventBus.class.getName(), this);
+		tracker.open();
+	}
+
+	public void stop(BundleContext context) throws Exception {
+		tracker.close();
+		tracker = null;
+
+		EngineActivator.context = null;
+	}
+
+	public Object addingService(ServiceReference reference) {
+		if (registration == null) {
+			ProvisioningEventBus eventBus = (ProvisioningEventBus) context.getService(reference);
+			registration = context.registerService(Engine.class.getName(), new Engine(eventBus), null);
+			return eventBus;
+		}
+		return null;
+	}
+
+	public void modifiedService(ServiceReference reference, Object service) {
+		// TODO Auto-generated method stub
+
+	}
+
+	public void removedService(ServiceReference reference, Object service) {
+		if (registration != null) {
+			registration.unregister();
+			registration = null;
+		}
+	}
+
+}